TagLib, is well, a library for reading and editing audio meta data,
commonly know as tags.
Some goals of TagLib:
A clean, high level, C++ API to handling audio meta data.
Support for at least ID3v1, ID3v2 and Ogg Vorbis comments.
A generic, simple API for the most common tagging related functions.
Binary compatibility between minor releases using the standard KDE/Qt
techniques for C++ binary compatibility.
Make the tagging framework extensible by library users; i.e. it will be
possible for libarary users to implement additional ID3v2 frames,
without modifying the TagLib source.
Because TagLib desires to be toolkit agnostic, in hope of being widely
adopted and the most flexible in licensing TagLib provides many of its
own toolkit classes; in fact the only external dependency that TagLib has,
it a semi-sane STL implementation.